It's easy to think of a broken product image as a cosmetic problem, a little icon where a photo should be, fixed whenever someone happens to notice it. In practice it does more damage than that, and it does it silently, since almost nobody who hits a broken image bothers to report it. They just leave.
It's the fastest trust signal on the page
Before a shopper reads a single word of your description, they look at the photo. A missing image in that exact spot reads less like a technical hiccup and more like abandonment, as if nobody's been maintaining the listing. That impression forms in under a second, and it colors how they read everything else on the page afterward.
It quietly breaks accessibility too
Shoppers using a screen reader rely on the image's alt text to know what's being described at all. When the image itself is broken, that context often breaks down with it, meaning the mistake doesn't just cost you a visual, it can cost you the ability of some visitors to understand the product page at all.
Why it happens more than store owners expect
Broken images usually aren't caused by anything dramatic. A CDN gets swapped, a theme update changes an image path, a bulk import points at a URL that later moved or expired. None of these show up as an error anywhere in the store's admin panel, the page still loads, it just quietly renders one broken spot where a photo used to be. That's exactly why it tends to go unnoticed for so long: nothing breaks loudly enough to get flagged.
The fix is almost always trivial once it's found, repoint the image or reupload it. The hard part is finding it before a customer does, which is the specific problem PagePolisher's scan checks for on every page it visits.